Physical questions

RackSaver has deployed over 100 Dual Xeon 2.4GHz - 2.8GHz clusters in
the last 4 months alone, each with 66 nodes. We have several 88 node
clusters (single rack) running the same systems. Check out the news
section (press release).
I guess you can call us a 'thermal' company.
Look at www.racksaver.com to get a better idea of the designs.
Danny
RackSaver, Inc.
San Diego, Ca.
-----Original Message-----
From: beowulf-admin at beowulf.org [mailto:beowulf-admin at beowulf.org] On
Behalf Of Robert G. Brown
Sent: Tuesday, January 14, 2003 3:20 PM
To: Michael Stein
Cc: beowulf at beowulf.org
Subject: Re: Physical questions
On Tue, 14 Jan 2003, Michael Stein wrote:
> > High density clusters also carry a fire risk of their very own. One
> > can easily achieve node densities that consume 2 or 3 thousand watts
> > in a rack (and with effort, can maybe double that).
>> I've seen a dual 2.4 GHz Xeon Intel 1U machine measured at 250 W
> (multiple "burn*" running). A rack full of these (42 U) really is
> 10KW.
Has anyone actually filled a rack with nodes this hot and burned this
much power, per node, sustained? Kind of scary, if you have;-)
A joule is dropping a one kilogram hammer on your finger from 10 cm.
So 10KW is a one-metric-ton jackhammer, pounding up and down one meter
once a second, sustained. With all the cooling fans running, it
probably sounds like one as well...:-)
Ouch!
rgb
--
Robert G. Brown http://www.phy.duke.edu/~rgb/
Duke University Dept. of Physics, Box 90305
Durham, N.C. 27708-0305
Phone: 1-919-660-2567 Fax: 919-660-2525 email:rgb at phy.duke.edu
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